Filter element having cover portion and filter assembly

ABSTRACT

A filter element may include a tubular member, and tubular member may include a partition at least partially defining first and second chambers. The tubular member may further include an end portion at least partially defining an inlet port configured to provide flow communication into the first chamber, and at least partially defining an outlet port configured to provide flow communication from the second chamber. The tubular member may further include a cover portion at the end portion of the tubular member, with the cover portion extending from the partition. The cover portion may be configured to at least partially cover a longitudinal end of the second chamber. The filter element may further include a filter medium associated with at least one outlet aperture and the at least one inlet aperture of the tubular member.

TECHNICAL FIELD

The present disclosure relates to a filter element and a filter assemblyincluding the filter element, and more particularly, to a filter elementhaving a cover portion and a filter assembly including the filterelement.

BACKGROUND

Filter systems may be used to filter fluids associated with operation ofa machine such as an internal combustion engine. For example, filtersystems may be used to remove particles from fuel and lubricant. Undersome circumstances, it may be desirable to refurbish or replace a usedfilter element, so that the effectiveness of the filtration may bemaintained. Upon installation of a new or refurbished filter element, itmay be desirable to prefill the canister and/or filter element withpreviously used fluid from the fluid system in which the filter assemblyis installed, for example, to prevent air pockets in the fluid system.However, because this fluid is previously used and may includepotentially damaging particles, it is not desirable for this previouslyused fluid to enter the fluid system until it has been filtered by thefilter assembly. Therefore, it may be desirable to provide a filterassembly that substantially prevents unfiltered fluid from entering thefluid system upon prefilling of the filter assembly when a new orrefurbished filter element is installed in the filter assembly.

A filter system is described in U.S. Pat. No. 7,503,952 B2 (“the '952patent”) issued to Lane et al. on Mar. 17, 2009. Specifically, the '952patent discloses a filter element for removing material entrained in agas stream. The filter element includes an end cap having an inlet tubeextending into a hollow space for receiving a gas stream. The inlet tubehas a side wall extending between an upstream open end and a downstreamopen end. There is at least one opening in the side wall, and the inlettube has an upstream band, a middlestream band, and a downstream band.The bands have equal axial lengths and are arranged such that theirplanes are perpendicular to the axis of the inlet tube.

Although the end cap of the '952 patent may serve to separate fluid flowinto the filter element, it is not configured to prevent unfilteredfluid from entering the fluid system upon prefilling of the filterassembly when a new or refurbished filter element is installed in thefilter assembly.

The filter element and filter assembly disclosed herein may be directedto mitigating or overcoming one or more of the possible drawbacks setforth above.

SUMMARY

In one aspect, the present disclosure is directed to a filter element.The filter element may include a tubular member having a longitudinalaxis. The tubular member may include a partition at least partiallydefining a first chamber and at least partially defining a secondchamber, with the partition extending longitudinally in the tubularmember and being configured to prevent flow communication between thefirst chamber and the second chamber within the tubular member. Thetubular member may further include an end portion at least partiallydefining an inlet port configured to provide flow communication into thefirst chamber, and at least partially defining an outlet port configuredto provide flow communication from the second chamber. The tubularmember may also include at least one outlet aperture in the tubularmember configured to provide flow communication out of the firstchamber, and at least one inlet aperture in the tubular memberconfigured to provide flow communication into the second chamber. Thetubular member may further include a cover portion at the end portion ofthe tubular member, with the cover portion extending from the partition.The cover portion may be configured to at least partially cover alongitudinal end of the second chamber with respect to the longitudinaldirection. The filter element may further include a filter mediumassociated with the at least one outlet aperture and the at least oneinlet aperture, wherein the filter element is configured such that fluidpassing through the filter element from the inlet port to the outletport passes through both the first chamber and the second chamber.

According to a further aspect, a filter element may include a tubularmember having a longitudinal axis. The tubular member may include apartition at least partially defining a first chamber and at leastpartially defining a second chamber, with the partition extendinglongitudinally in the tubular member and being configured to preventflow communication between the first chamber and the second chamberwithin the tubular member. The tubular member may further include an endportion at least partially defining an inlet port configured to provideflow communication into the first chamber, and at least partiallydefining an outlet port configured to provide flow communication fromthe second chamber. The tubular member may also include at least oneoutlet aperture in the tubular member configured to provide flowcommunication out of the first chamber, and at least one inlet aperturein the tubular member configured to provide flow communication into thesecond chamber. The tubular member may further include a cover portionat the end portion of the tubular member, the cover portion extendingfrom the partition. The filter element may further include a filtermedium associated with the at least one outlet aperture and the at leastone inlet aperture. The tubular member may have a cross-sectiontransverse to the longitudinal axis including a first chambercross-section and a second chamber cross-section, and the cover portionmay at least partially cover the second chamber cross-section withrespect to the longitudinal direction.

According to still a further aspect, a filter assembly may include afilter base configured to be coupled to a machine, and a canister havingan open end, a closed end, and being configured to be coupled to thefilter base. The filter assembly may further include a filter elementconfigured to be received in the canister. The filter element mayinclude a tubular member having a longitudinal axis. The tubular membermay include a partition at least partially defining a first chamber andat least partially defining a second chamber, with the partitionextending longitudinally in the tubular member and being configured toprevent flow communication between the first chamber and the secondchamber within the tubular member. The tubular member may furtherinclude an end portion at least partially defining an inlet portconfigured to provide flow communication into the first chamber, and atleast partially defining an outlet port configured to provide flowcommunication from the second chamber. The tubular member may alsoinclude at least one outlet aperture in the tubular member configured toprovide flow communication out of the first chamber, and at least oneinlet aperture in the tubular member configured to provide flowcommunication into the second chamber. The tubular member may furtherinclude a cover portion at the end portion of the tubular member, withthe cover portion extending from the partition. The cover portion may beconfigured to at least partially cover a longitudinal end of the secondchamber with respect to the longitudinal direction. The filter elementmay further include a filter medium associated with the at least oneoutlet aperture and the at least one inlet aperture. The filter elementmay be configured such that fluid passing through the filter elementfrom the inlet port to the outlet port passes through both the firstchamber and the second chamber.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective section view of an exemplary embodiment of afilter assembly.

FIG. 2 is a partial perspective section view of the exemplary filterassembly shown in FIG. 1.

FIG. 3 is a perspective view of an exemplary embodiment of a filterelement.

FIG. 4 is a partial perspective view of the exemplary filter elementshown in FIG. 3.

FIG. 5 is a perspective view of an exemplary embodiment of a portion ofan exemplary filter element.

FIG. 6 is a partial perspective section view of the exemplary portion ofthe exemplary filter element shown in FIG. 5.

FIG. 7 is an end view of the exemplary portion shown in FIG. 5.

FIG. 8 is section view of the exemplary portion shown in FIG. 5.

FIG. 9 is a partial perspective end view of the exemplary portion shownin FIG. 5.

FIG. 10 is a partial perspective section view of a portion of theexemplary filter assembly shown in FIG. 1.

FIG. 11 is a partial perspective section view of the portion of theexemplary filter assembly shown in FIG. 10.

FIG. 12 is a partial side section view of a portion of the exemplaryfilter assembly shown in FIG. 1.

DETAILED DESCRIPTION

FIG. 1 illustrates an exemplary embodiment of a filter assembly 10.Filter assembly 10 may be used to filter fluids such as, for example,fuel, lubricants, coolants, and hydraulic fluid used by machines.According to some embodiments, filter assembly 10 may be used as afuel/water separator filter and/or as an air filter. Other uses may becontemplated.

Exemplary filter assembly 10 shown in FIG. 1 includes a filter base 12configured to couple filter assembly 10 to a machine, a canister 14configured to be coupled to filter base 12, and a filter element 16configured to be received in canister 14. Exemplary filter base 12includes a mounting bracket 18 having at least one hole 20 (e.g., twoholes 20) for receiving a fastener for coupling filter base 12 to amachine. Other coupling configurations are contemplated. Exemplaryfilter base 12 also includes an extension 22 and a canister coupler 24configured to be coupled to canister 14. Extension 22 serves to spacecanister coupler 24 from mounting bracket 18 to provide clearance forcanister 14.

As shown in FIGS. 1 and 2, exemplary canister coupler 24 of filter base12 includes an inlet passage 26, a receiver 28, and an outlet passage30. Exemplary inlet passage 26 is configured to be coupled to a fluidconduit of a fluid system, such as, for example, a fuel system, alubrication system, a hydraulic system, or a coolant system, such thatit receives fluid for filtration in filter assembly 10. Exemplaryreceiver 28 is configured to receive a portion of filter element 16, asexplained in more detail herein. Exemplary outlet passage 30 isconfigured to be coupled to a fluid conduit of the fluid system, suchthat fluid exiting filter assembly 10 returns to the fluid systemfollowing filtration. As explained in more detail herein, the roles ofinlet passage 26 and outlet passage 30 may be reversed, such that outletpassage 30 is coupled to a fluid conduit and receives fluid forfiltration in filter assembly 10, and inlet passage 26 is configured tobe coupled to a fluid conduit, such that fluid exiting filter assembly10 returns to the fluid system following filtration via inlet passage26.

Exemplary canister 14 shown in FIG. 1 includes an open end 32, anoppositely-disposed closed end 34, and a body portion 36 extendingtherebetween. Canister 14 includes a mounting flange 38 adjacent openend 32. As shown in FIGS. 1 and 2, open end 32 of canister 14 isreceived in an open-ended housing 40 of filter base 12, with mountingflange 38 abutting an end 42 of a base wall 44 of housing 40. Asexplained in more detail herein with respect to FIG. 12, one or moreseals may be provided between open end 32 of canister 14 and housing 40to provide a fluid-tight barrier between canister 14 and housing 40(e.g., between open end 32 and base wall 44). Further, engagementstructures such as those explained herein may be provided to securecanister 14 to filter base 12.

Exemplary canister 14 and housing 40 may define respectivecross-sections. For example, canister 14 and housing 40 may definerespective cross-sections that are substantially circular, substantiallyoval-shaped, and/or substantially polygonal. According to someembodiments, the cross-sections may be substantially constant along thelongitudinal length of canister 14 (e.g., as shown in FIG. 1). Accordingto some embodiments, the cross-sections may be vary along thelongitudinal length of canister 14. The cross-sections may be chosenbased on various considerations, such as, for example, the size andshape of the available space at a location of a machine that receivesfilter assembly 10.

As shown in FIG. 1, exemplary filter element 16 is received in canister14 and cooperates with filter base 12 and canister 14, such thatparticles in fluid received in inlet passage 26 of filter base 14 arefiltered by filter element 16, and the filtered fluid exits outletpassage 30 of filter base 14 following filtration. According to someembodiments, filter element 16 is configured such that fluid passingthrough filter element 16 from inlet passage 26 of filter base 12 tooutlet passage 30 of filter base 12 is subjected to two filtrationprocesses.

As shown in FIGS. 1 and 3-9, exemplary filter element 14 includes atubular member 46 substantially surrounded by a filter medium 48. Filtermedium 48 may include any filter medium type known to those skilled inthe art, such as, for example, foam-type, screen-type, paper-type, andcombinations thereof. Some embodiments of filter element 14 include afirst end cap 50 coupled at a longitudinal end of tubular member 46 atan end configured to be adjacent filter base 12 upon installation, and asecond end cap 52 coupled at a longitudinal end of tubular member 46opposite first end cap 50.

In the exemplary embodiment shown in FIGS. 1 and 3-9, tubular member 46of filter element 16 defines a longitudinal axis X and includes apartition 54 at least partially defining a first chamber 56 and at leastpartially defining a second chamber 58. As shown, exemplary partition 54extends longitudinally within tubular member 46 and prevents flowcommunication between first chamber 56 and second chamber 58 withintubular member 46. Tubular member 46 includes a first end portion 60 ata first longitudinal end of tubular member 46 and a second end portion61 at a second, opposite longitudinal end of tubular member 46.Exemplary first end portion 60 at least partially defines an inlet port62 and at least partially defines an outlet port 64. For example, forembodiments in which tubular member 46 has a substantially circularcross-section, inlet port 62 may be located circumferentially oppositeoutlet port 64.

As shown in FIGS. 1 and 2, exemplary end portion 60 is received inreceiver 28 of filter base 12. One or more seals 66, such as, forexample, O-ring seals shown in FIGS. 1, 2, and 3-7 may be provided tocreate a fluid-tight seal between end portion 60 of tubular member 46and filter base 12. Exemplary inlet port 62 provides flow communicationbetween inlet passage 26 of filter base 14 and first chamber 56 oftubular member 46. Exemplary outlet port 64 provides flow communicationbetween second chamber 58 of tubular member 46 and outlet passage 30 offilter base 14. In the exemplary embodiment shown, inlet passage 26 andinlet port 62 provide the only fluid entry point for fluid enteringfilter element 16, and outlet port 64 and outlet passage 30 provide theonly fluid exit point for fluid exiting filter element 16.

As shown in FIGS. 1, 2, 5, and 6, exemplary tubular member 46 includesat least one outlet aperture 68 (e.g., a plurality of outlet apertures68 as shown) configured to provide flow communication out of firstchamber 56, through a first portion 70 of filter medium 48, and into aninterior space 72 of canister 14. Exemplary tubular member 46 alsoincludes at least one inlet aperture 74 (e.g., a plurality of inletapertures 74 as shown) configured to provide flow communication frominterior space 72 of canister 14, through a second portion 76 of filtermedium 48, and into second chamber 58 of tubular member 46. As shown inFIG. 8, first portion 70 of filter medium 48 is associated with outletapertures 68, and second portion 76 of filter medium 48 is associatedwith inlet apertures 74. In particular, first portion 70 is locatedexterior and adjacent to outlet apertures 68, such that fluid flowingfrom first chamber 56 into interior space 72 of canister 40 passesthrough first portion 70, thereby filtering the fluid passing throughoutlet apertures 68. Second portion 76 is located exterior and adjacentto inlet apertures 74, such that fluid flowing from interior space 72 ofcanister 40 into second chamber 58 passes through second portion 76,thereby filtering the fluid passing through inlet apertures 74. As shownin FIGS. 1, 2 and 5 the inlet apertures 74 and outlet apertures 68extend in a radial direction relative to the longitudinal axis of thetubular member 46 between a radially inner peripheral surface portion ofthe exterior wall 114 and a radially outer peripheral surface portion ofthe exterior wall 114.

As shown in FIG. 1, exemplary filter assembly 10 is configured such thatfluid passing through the filter element 16 enters filter assembly 10via inlet passage 26 of filter base 12. Fluid flows from inlet passage26 into inlet port 62 of end portion 60 and into first chamber 56.Thereafter, fluid flows out of at least one outlet aperture 68, throughfirst portion 70 of filter medium 48, and into interior space 72 ofcanister 14. Passing through first portion 70 of filter medium 48results in the fluid being subjected to a first filtration process. Oncein interior space 72 of canister 40 following the first filtrationprocess, the fluid is able to flow around filter element 16 withincanister 40 and enter second chamber 58 of tubular member 46. Forexample, fluid may flow circumferentially around exemplary filterelement 16 and/or between second end cap 52 and closed end 34 ofcanister 14 to second portion 76 of filter medium 48. Thereafter, thefluid passes through second portion 76 of filter medium 48, through atleast one inlet aperture 74, and into second chamber 58. Passing throughsecond portion 76 of filter medium 48 results in the fluid beingsubjected to a second filtration process. Thereafter, the fluid flowsfrom second chamber 58 via tubular member 46 to outlet port 64, andexits filter element 16 via outlet passage 30 of filter base 12. Thus,in this exemplary embodiment, fluid passing through filter element 16from inlet port 62 to outlet port 64 passes through both first chamber56 and second chamber 58, for example, such that the fluid passingthrough filter element 16 from inlet port 62 to outlet port 64 passesthrough both first portion 70 of filter medium 48 and second portion 76of filter medium 48. In this exemplary manner, fluid entering filterassembly 10 is subjected to two filtration processes within a singlefilter assembly including a single canister and a single filter element.

As shown in FIGS. 5-9, exemplary tubular member 46 includes at least afirst barrier 78 and a second barrier 80 extending radially from theexterior surface of tubular member 46. As shown in FIG. 8, first portion70 of filter medium 48 extends between first barrier 78 and secondbarrier 80 in association with first chamber 56. Second portion 76 offilter medium 48 extends between first barrier 78 and second barrier 80in association with second chamber 58. First barrier 78 and secondbarrier 80 serve to prevent fluid exiting outlet apertures 68 fromentering inlet apertures 74 without first passing through the entirethickness of first portion 70 and the entire thickness of second portion76 of filter medium 48.

According to some embodiments, first barrier 78 and/or second barrier 80may be substantially planar, for example, as shown in FIGS. 5-9.According to some embodiments, first barrier 78 and/or second barrier 80may be curved. According to some embodiments, first barrier 78 and/orsecond barrier 80 may have a length such that respective ends of thebarriers are substantially flush with an exterior surface of filtermedium 48, for example, as shown in FIG. 8. According to someembodiments, first barrier 78 and/or second barrier 80 may have a lengthsuch that respective ends of the barriers extend beyond the exteriorsurface of filter medium 48. According to some embodiments, firstbarrier 78 and/or second barrier 80 may have a length such thatrespective ends of the barriers do not reach the exterior surface offilter medium 48.

In the exemplary embodiment shown, tubular member 46 has a substantiallycircular cross-section. According to some embodiments, tubular member 46may have other cross-sections, such as, for example, substantiallyoval-shaped and substantially polygonal. According to some embodiments,the cross-sectional shape of tubular member 46 may be substantiallyconstant along its longitudinal length, for example, as shown. Accordingto some embodiments, the cross-section of tubular member 46 may be varyalong its longitudinal length. The cross-section may be chosen based onvarious considerations, such as, for example, the size and shape of theavailable space at a location of a machine that receives filter assembly10.

As shown in FIGS. 6 and 8, partition 54 of tubular member 46 may becurved or include a number of segments joined to one another. Forexample, exemplary partition 54 includes a first segment 82 joined to asecond segment 84, with first segment 82 and second segment 84 meetingan angle α with respect to each other. For example, angle α may rangefrom about 20 degrees to about 180 degrees, from about 30 degrees toabout 150 degrees, from about 40 to about 120 degrees, from about 60degrees to about 110 degrees, or from about 70 degrees to about 100degrees (e.g., about 90 degrees). Angle α may be selected based onvarious considerations, such as, for example, the desired level ofdifference in filtration provided by first portion 70 of filter medium48 and second portion 76 of filter medium 48.

According to some embodiments, the filter medium of first portion 70 mayhave the same filtering characteristics as the filter medium of secondportion 76. According to some embodiments, the filter medium of firstportion 70 may have different filtering characteristics than the filtermedium of second portion 76. According to some embodiments, firstportion 70 and second portion 76 of filter medium 48 may have the samethickness, a different thickness, and/or a different length (e.g., adifferent circumferential length).

As shown in FIGS. 6 and 8, exemplary first barrier 78 and second barrier80 form extensions of partition 54 by being coupled to the exteriorsurface of tubular member 46 at the same circumferential locations asthe points at which the ends of partition 54 are coupled to the interiorsurface of tubular member 46. According to some embodiments, firstbarrier 78 and second barrier 80 are coupled to the exterior surface oftubular member 46 at circumferential locations different from the pointsat which the ends of partition 54 are coupled to the interior surface oftubular member 46.

As shown in FIGS. 3 and 4, exemplary filter element 16 includes aspirally-wound roving 86 configured to secure filter medium 48 againsttubular member 46. For example, roving 86 may serve to hold both firstportion 70 and second portion 76 of filter medium 48 against tubularmember 46. Although the exemplary embodiment shown in FIGS. 3 and 4includes spirally-wound roving 86, alternative ways to couple filtermedium 48 to tubular member 46 are contemplated.

Referring to FIGS. 1, 2, 6, 8, 10, and 11, tubular member 46 of filterelement 16 may include a vent tube 88 defining a vent passage 89configured to provide flow communication between first end portion 60and second end portion 61 of tubular member 46. For example, exemplaryvent tube 88 extends longitudinally between first end portion 60 andsecond end portion 61, defining a first end aperture 90 at first endportion 60 and a second end aperture 92 and second end portion 61.

In the exemplary embodiments shown, vent tube 88 is associated withpartition 54 and extends in second chamber 58 of tubular member 46. Inthis exemplary configuration, flow communication is substantiallyprevented between first chamber 56 and vent tube 88 without passingthrough second chamber 58. Although shown extending in second chamber58, vent tube 88 may alternatively extend in first chamber 56, and inthis alternative configuration flow communication is substantiallyprevented between second chamber 58 and vent tube 88 without passingthrough first chamber 56.

As shown in FIG. 1, closed end 34 of exemplary canister 14 defines adrain aperture 94 configured to receive a drain plug 96. Drain aperture94 and drain plug 96 may be configured to disengage from one another,such that fluid may be drained from filter assembly 10. For example,drain aperture 94 and drain plug 96 may include cooperating threads forengaging one another. Other engagement structures are contemplated.

As shown in FIG. 1, closed end 34 of exemplary canister 14 includes aprojection 98 in which drain aperture 94 is defined. Second end portionof 61 of tubular member 46 defines a recess 100 configured to receiveprojection 98 of canister 14. According to some embodiments, projection98 includes a tapered (e.g., substantially conical) locator 102surrounding drain aperture 94, and second end portion 61 of tubularmember 46 includes a tapered (e.g., conical) receiver 104 configured toreceive locator 102, such that drain aperture 94 substantially alignswith vent passage 89 of vent tube 88 at second end portion 61 of tubularmember 46. According to this exemplary configuration, fluid may bedrained from filter assembly 10 by removing or disengaging drain plug 96from drain aperture 94, so that fluid may flow from canister 14 and/orfilter element 16 via drain aperture 94. Exemplary vent tube 88 permitsair outside filter assembly 10 to enter at second end portion 61 oftubular member 46 and flow via vent passage 89 to first end portion 60of tubular member 46. This, in turn, allows fluid to flow more freelyfrom canister 14 and/or filter element 16 through drain aperture 94 andout of filter assembly 10, thereby facilitating ease of drainage offluid from filter assembly 10, for example, when replacing filterelement 16.

As shown in FIGS. 1-5 and 7, exemplary tubular member 46 includes acover portion 106 at first end portion 60. Cover portion 106 isconfigured to at least partially cover (without closing outlet port 64of tubular member 46) a longitudinal end of second chamber 58 of tubularmember 46 with respect to the longitudinal direction. For example,tubular member 46 has a cross-section transverse to (e.g., perpendicularto) longitudinal axis X that includes a cross-section 108 of firstchamber 56 and a cross-section 110 of second chamber 58. Exemplary coverportion 106 at least partially covers second chamber cross-section 110with respect to the longitudinal direction.

According to some embodiments, cover portion 106 may serve as ananti-prefill device. For example, upon replacement of filter element 16,it may be desirable to prefill canister 14 and/or filter element 16 withpreviously used fluid from the fluid system in which filter assembly 10is installed, for example, to prevent air pockets in the fluid system.However, because this fluid is previously used and may includeundesirable particles, it is desirable for this previously used fluid tobe filtered before returning to the fluid system. As previously usedfluid is added to filter assembly 10 via inlet port 62 of filter element16, exemplary cover portion 106 may serve to prevent the added fluidfrom entering second chamber 58 without first flowing through firstchamber 56 and filter medium 48, such that particles are at leastpartially removed from the added fluid prior to entering second chamber58 and returning to the fluid system following activation of the machine(e.g., starting the engine of the machine).

In the exemplary embodiment shown, cover portion 106 extends at anoblique angle β (FIG. 10) with respect to longitudinal axis X of tubularmember 46. Angle β may range from about 10 degrees to about 80 degrees,from about 20 degrees to about 75 degrees, from about 30 degrees toabout 60 degrees, or from about 40 degrees to about 50 degrees (e.g.,about 45 degrees). Angle β may be selected based on variousconsiderations, such as, for example, the size of inlet port 62 and/oroutlet port 64 of tubular member 46. According to some embodiments(e.g., as shown), cover portion 106 extends from an end of partition 54at oblique angle β.

Exemplary cover portion 106 includes an upper surface 112 extending atan oblique angle. According to some embodiments, the oblique angle ofupper surface 112, is the same as angle β. According to someembodiments, the oblique angle of upper surface 112 differs from angleβ. In the exemplary embodiments shown, upper surface 112 is configuredto abut a complimentary surface of filter assembly 10, as explained inmore detail herein.

As shown in FIGS. 1-3, 5, and 6, tubular member 46 includes an exteriorwall 114 extending in the longitudinal direction. In the exemplaryembodiment shown, outlet port 64 is defined by an outlet apertureextending in a radial direction relative to a longitudinal axis of thetubular member 46 between a radially inner peripheral surface portion ofthe exterior wall 114 and a radially outer peripheral surface portion ofexterior wall 114 of tubular member 46. As shown in FIGS. 3-7, tubularmember 46 includes two seals 66 (e.g., O-ring seals), with a first seal66 extending at angle P at a remote end of first end portion 60 and asecond seal 66 located at a position of tubular member 46 between firstend cap 50 and outlet port 64. According to some embodiments, thisexemplary seal arrangement serves to seal outlet port 64 from the restof filter assembly 10.

Referring to FIGS. 10 and 11, exemplary filter base 12 includes a filterbase system 116 including a filter assembly coupler 117 (e.g., includingcanister coupler 24) configured to couple canister 14 and/or filterelement 16 to a machine. In the exemplary embodiment shown in FIGS. 10and 11, inlet passage 26 and outlet passage 28 of filter base 12 eachdefine a longitudinal axis P. In the exemplary embodiment shown,longitudinal axes P are substantially co-linear. Alternatively, they maybe substantially parallel without being co-linear, or they may be skewedwith respect to one another.

In the exemplary embodiment shown, receiver 28 includes a receiverpassage 118 configured to receive first end portion 60 of tubular member46. Exemplary receiver passage 118 extends substantially parallel tolongitudinal axis X of tubular member 46 and substantially transverse to(e.g., perpendicular to) longitudinal axes P of inlet passage 26 andoutlet passage 30 of filter base 12.

As shown in FIGS. 10 and 11, filter base system 116 includes a base plug120 configured to be received in a first end of receiver passage 118opposite a second end of receiver passage 118 configured to receivefirst end portion 60 of tubular member 46 of filter element 16.Exemplary base plug 120 includes a base plug body 122 configured toprovide a fluid-tight seal between base plug 120 and receiver passage118. As shown, exemplary base plug body 122 includes a plug surface 124configured to cooperate with upper surface 112 of cover portion 106 oftubular member 46, such that orientation of filter element 16 withrespect to filter base 12 depends on orientation of base plug 120 inreceiver passage 118. For example, plug surface 124 extends at anoblique angle complimentary to the angle of upper surface 112 of coverportion 106. Thus, if base plug 120 is oriented in receiver passage 118,such that plug surface 124 extends in a first direction (e.g., down andto the right as shown in FIGS. 10 and 11), then filter element 16 mustbe oriented with respect to filter base 12, such that upper surface 112of cover portion 106 extends in the first direction. Alternatively, ifbase plug 120 is oriented in receiver 28 such that plug surface 124extends in a second direction (e.g., down and to the left (not shown)),then filter element 16 must be oriented with respect to filter base 12,such that upper surface 112 of cover portion 106 also extends in thesecond direction. This exemplary configuration may serve to ensure thatfilter element 16 is installed in the correct orientation relative tofilter base 12.

In the exemplary embodiment shown, base plug 120 includes one or more(e.g., two) locators 126 (e.g., extensions), and an upper surface offilter base 12 includes one or more locator receivers 128 (e.g.,recesses) configured to receive locator(s) 126 upon receipt of base plug120 in receiver passage 118 of filter base 12. Locator 126 and locatorreceiver 128 are configured to prevent improper orientation of base plug120 with respect to filter base 12 upon receipt of base plug 120 inreceiver passage 118. In the exemplary embodiment shown in FIGS. 10 and11, filter base 12 includes two locator receivers 128, such that baseplug 120 may be selectively receivable in one of two orientationsrelative to filter base 12. According to some embodiments, two locatorreceivers 128 are located opposite one another with respect to receiverpassage 118. Such an exemplary configuration permits base plug 120 to bereceived in receiver passage 118 in one of two orientations 180 degreesfrom one another. As a result, plug surface 124 either extends in afirst direction (e.g., down and to the right as shown in FIGS. 10 and11), or extends in a second direction (e.g., down and to the left). As aresult, filter element 16 must be oriented with respect to filter base12, such that upper surface 112 of cover portion 106 extends in eitherthe first direction or the second direction.

In this exemplary configuration, filter element 16 must be oriented inone of two orientations relative to filter base 12, but prevents otherorientations. This may serve to ensure that filter element 16 isoriented, so that inlet port 62 is either aligned with inlet passage 26of filter base 12 or aligned with outlet passage 30 of filter base 12.This results in filter assembly 10 being reversible with respect to themachine on which it is installed. For example, space considerations mayresult in supplying fluid for filtration to filter assembly 10 from oneside of filter assembly 10, for example, from the right side as shown inFIGS. 1, 2, 10, and 11. In such situations, passage 26 of filter base 12serves as an inlet passage, and passage 30 serves as an outlet passage.However, space considerations may result in supplying fluid forfiltration to filter assembly 10 from the other side of filter assembly10 (i.e., from the left side as shown in FIGS. 1, 2, 10, and 11). Insuch situations, passage 30 of filter base 12 serves as an inletpassage, and passage 26 serves as an outlet passage, thereby reversingthe flow of fluid though filter base 12.

In order to ensure that desired filtration occurs, regardless of thedirection through filter base 12 which fluid flows, filter element 16needs to be in the proper orientation to ensure that fluid flows throughfilter element 16 in the desired manner (e.g., the manner set forthpreviously herein). Exemplary base plug 120 serves to ensure that filterelement 16 is in the desired orientation. According to some embodiments,base plug 120 includes an upper surface 130 having directional indicator132. For example, exemplary base plug 120 includes an arrow indicatingthe direction of fluid flow through filter base 12. As shown,directional indicator 132 and plug surface 124 cooperate, such thatfilter element 16 may be installed in filter base 12 in the properorientation for the direction of fluid flow through filter base 12indicated by directional indicator 132.

In the exemplary embodiment shown in FIGS. 10 and 11, base plug 120includes a seal groove 136 configured to receive a seal 134 to provide afluid-tight seal between base plug 120 and receiver passage 118.According to some embodiments, the interior surface of receiver passage118 also includes a retainer groove 138, and base plug 120 includes aretainer projection 140 configured to be received in retainer groove 138to retain base plug 120 in receiver passage 118. According to someembodiments, the cross-sectional shape of receiver passage 118 issubstantially circular, although other cross-sectional shapes arecontemplated, and base plug 120 will be configured to correspond to thecross-sectional shape of receiver passage 118.

As shown in FIG. 12, exemplary first end cap 50 of filter element 16includes a plate 142 substantially transverse to (e.g., perpendicularto) longitudinal axis X. Plate 142 includes a plate aperture 144 throughwhich first end portion 60 of tubular member 46 extends into receiver 28of filter base 12. Exemplary first end cap 50 also includes a sealingwall 146 coupled to plate 142 and extending substantially transverse to(e.g., perpendicular to) plate 142. As shown in FIG. 12, exemplarysealing wall 146 includes an end remote from plate 142 having anenlarged seal portion 148 configured to be compressed between an end ofa wall 140 of canister 14 and an interior surface of base wall 44 offilter base 12 to provide a fluid-tight seal between canister 14 andfilter base 12. According to the exemplary embodiment shown, plate 142is circular, and sealing wall 146 is an annular wall extending aroundthe periphery of plate 142. Sealing wall 146 and/or seal portion 148 maybe formed from a material that provides a fluid seal, such as, forexample, elastically-deformable polymer materials known to those skilledin the art.

In the exemplary configuration shown, compression of seal portion 148 isradial rather than longitudinal. Because, according to some embodiments,the radial orientation of filter element 16 with respect filter base 12is fixed, depending on the direction fluid flows through filter base 12,filter element 16 does not spin with respect to filter base 12. As aresult, filter element 16 is not tightened with respect to filter base12 by being spun onto threads, which would compress a seal in alongitudinal manner. Rather, in the exemplary configuration shown,canister 14 and filter element 16 within canister 14 are pushedlongitudinally up into housing 40 of filter base 12. Sealing wall 146and/or seal portion 148 extend around an end portion of canister wall140, and canister 14 and filter element 16 slide longitudinally intohousing 40, with sealing wall 146 and seal portion 148 being received ina pocket 150 created between the end of wall 140 of canister 14 and theinterior surface of base wall 44 of filter base 12. Thereafter, asecuring mechanism may be used to secure canister 14 and filter element16 in the assembled position with respect to filter base 12, asexplained below.

Exemplary first end cap 50 also includes a retainer wall 152 coupled toand extending substantially transverse to (e.g., parallel to) plate 142.As shown, exemplary retainer wall 152 may serve to locate and retainfilter medium 48 in filter element 16.

According to some embodiments, the cross-sectional shape of filter base12, canister 14, and/or filter element 16 is substantially circular, andsealing wall 146 and retainer wall 152 form annular walls. According tosome embodiments, filter base 12, canister 14, and/or filter element 16have a cross-sectional shape other than circular, such as, for example,substantially oval-shaped or substantially polygonal, and sealing wall146 and retainer wall 152 have corresponding configurations.

As shown in FIGS. 1, 2, and 12, exemplary filter assembly 10 includes aretainer mechanism 154 configured to secure canister 14 and filterelement 16 to filter base 12. In the exemplary embodiment shown,canister wall 140 includes a canister groove 156, and base wall 44 offilter base 12 includes a housing groove 158. Exemplary retainermechanism 154 further includes a retainer strip 160 configured to bereceived in canister groove 156 and housing groove 158 upon alignment ofcanister groove 156 with housing groove 158, to thereby retain canister14 in housing 40 of filter base 12, with seal portion 148 radiallycompressed in pocket 150. Exemplary retainer mechanism 154 also includesan exterior band 162 that covers retainer strip 160.

INDUSTRIAL APPLICABILITY

The filter assembly of the present disclosure may be useful forfiltering fluids for a variety of machines including power systems,coolant systems, hydraulic systems, and/or air handling systems.Referring to FIG. 1, a supply of fluid may be supplied to filterassembly 10 via a fluid conduit, filtered via filter assembly 10, andrecirculated into the fluid system via a conduit.

For example, as shown in FIG. 1, fluid enters filter assembly 10 viainlet passage 26 of filter base 12. The fluid flows from inlet passage26 into inlet port 62 and into first chamber 56. Thereafter, fluid flowsout of at least one outlet aperture 68, through first portion 70 offilter medium 48, and into canister 14, thereby subjecting the fluid toa first filtration process. Thereafter, the fluid flows around filterelement 16 and enters second chamber 58 by passing through secondportion 76 of filter medium 48 and at least one inlet aperture 74,thereby subjecting the fluid to a second filtration process. Thereafter,the fluid flows from second chamber 58 to outlet port 64, and exitsfilter element 16 via outlet passage 30 of filter base 12.

Cover portion 106 of first end portion 60 of tubular member 46 isconfigured to at least partially cover (but not close) a longitudinalend of second chamber 58 with respect to the longitudinal direction. Forexample, tubular member 46 may have a cross-section transverse to (e.g.,perpendicular to) its longitudinal axis X that includes a cross-section108 of first chamber 56 and a cross-section 110 of second chamber 58.Cover portion 106 may at least partially cover second chambercross-section 110 with respect to the longitudinal direction.

In such a configuration, cover portion 106 may serve as an anti-prefilldevice. For example, upon replacement of filter element 16, it may bedesirable to prefill canister 14 and/or filter element 16 withpreviously used fluid from the fluid system in which filter assembly 10is installed, for example, to prevent air pockets in the fluid system.Because this fluid is previously used and may include potentiallydamaging particles, it is desirable to ensure that this previously usedfluid is filtered before returning to the fluid system. As previouslyused fluid is added to filter assembly 10 via inlet port 62 of filterelement 16, cover portion 106 may serve to prevent the added fluid fromentering second chamber 58 without first flowing through first chamber56 and filter medium 48, such that any particles are at least partiallyremoved from the added fluid prior to entering second chamber 58 andreturning to the fluid system following activation of the machine (e.g.,starting the engine of the machine). This may prevent potentiallydamaging particles from being introduced into the fluid system uponreplacement or refurbishment of filter element 16.

It will be apparent to those skilled in the art that variousmodifications and variations can be made to the disclosed, exemplaryfilter assemblies. Other embodiments will be apparent to those skilledin the art from consideration of the specification and practice of thedisclosed examples. It is intended that the specification and examplesbe considered as exemplary only, with a true scope being indicated bythe following claims and their equivalents.

What is claimed is:
 1. A filter element comprising: a tubular memberhaving a longitudinal axis and including: an exterior wall extending inthe longitudinal direction; a partition at least partially defining afirst chamber and at least partially defining a second chamber, thepartition extending longitudinally in the tubular member and beingconfigured to prevent flow communication between the first chamber andthe second chamber within the tubular member; an end portion at leastpartially defining an inlet port configured to provide flowcommunication into the first chamber, and at least partially defining anoutlet port configured to provide flow communication from the secondchamber, wherein the outlet port passes through the exterior wall of thetubular member extending in a radial direction relative to thelongitudinal axis of the tubular member between a radially innerperipheral surface portion of the exterior wall and a radially outerperipheral surface portion of the exterior wall; at least one outletaperture in the exterior wall of the tubular member configured toprovide flow communication out of the first chamber, wherein the atleast one outlet aperture extends in a radial direction relative to thelongitudinal axis of the tubular member between a radially innerperipheral surface portion of the exterior wall and a radially outerperipheral surface portion of the exterior wall; at least one inletaperture in the exterior wall of the tubular member configured toprovide flow communication into the second chamber, wherein the at leastone inlet aperture extends in a radial direction relative to thelongitudinal axis of the tubular member between a radially innerperipheral surface portion of the exterior wall and a radially outerperipheral surface portion of the exterior wall; and a cover portion atthe end portion of the tubular member, the cover portion extending fromthe partition, wherein the cover portion is configured to at leastpartially cover a longitudinal end of the second chamber with respect tothe longitudinal direction; and a filter medium associated with the atleast one outlet aperture and the at least one inlet aperture, whereinthe filter element is configured such that fluid passing through thefilter element from the inlet port to the outlet port passes throughboth the first chamber and the second chamber.
 2. The filter element ofclaim 1, wherein the tubular member has a cross-section transverse tothe longitudinal axis including a first chamber cross-section and asecond chamber cross-section, and wherein the cover portion at leastpartially covers the second chamber cross-section with respect to thelongitudinal direction.
 3. The filter element of claim 1, wherein thecover portion extends at an oblique angle with respect to thelongitudinal axis of the tubular member.
 4. The filter element of claim1, wherein the cover portion is configured to substantially prevent flowof fluid into the second chamber without first passing through the firstchamber.
 5. The filter element of claim 1, wherein the cover portion isconfigured to substantially prevent flow of fluid into the secondchamber without first passing through the filter medium.
 6. The filterelement of claim 1, wherein the tubular member further includes at leasta first barrier and a second barrier extending radially from the tubularmember.
 7. The filter element of claim 6, wherein the filter mediumincludes a first portion associated with the at least one outletaperture, and a second portion associated with the at least one inletaperture, and wherein the first portion of the filter medium extendsbetween the first and second barriers in association with the firstchamber, and the second portion of the filter medium extends between thefirst and second barriers in association with the second chamber.
 8. Thefilter element of claim 7, wherein the filter element is configured suchthat fluid passing through the filter element flows into the inlet portin the end portion, into the first chamber, out of the at least oneoutlet aperture, through the first portion of the filter medium, to thesecond portion of the filter medium, through the second portion of thefilter medium into the at least one inlet aperture and into the secondchamber, and out of the filter element through the outlet port.
 9. Thefilter element of claim 1, wherein the tubular member has at least onecross-section, and the at least one cross-section is at least one ofsubstantially circular, substantially oval-shaped, and substantiallypolygonal.
 10. The filter element of claim 1, further including a firstend cap and a second end cap, wherein the first end cap is coupled at alongitudinal end of the tubular member adjacent the inlet port and theoutlet port, and the second end cap is coupled at a longitudinal end ofthe tubular member opposite the first end cap.
 11. The filter element ofclaim 1, wherein the partition includes a first segment and a secondsegment, and wherein the first segment and second segment meet at anangle with respect to each other, and the angle ranges from about 20degrees to about 180 degrees.
 12. A filter element comprising: a tubularmember having a longitudinal axis and including: an exterior wallextending in the longitudinal direction; a partition at least partiallydefining a first chamber and at least partially defining a secondchamber, the partition extending longitudinally in the tubular memberand being configured to prevent flow communication between the firstchamber and the second chamber within the tubular member; an end portionat least partially defining an inlet port configured to provide flowcommunication into the first chamber, and at least partially defining anoutlet port configured to provide flow communication from the secondchamber; at least one outlet aperture in the exterior wall of thetubular member configured to provide flow communication out of the firstchamber, wherein the at least one outlet aperture extends in a radialdirection relative to the longitudinal axis of the tubular memberbetween a radially inner peripheral surface portion of the exterior walland a radially outer peripheral surface portion of the exterior wall; atleast one inlet aperture in the exterior wall of the tubular memberconfigured to provide flow communication into the second chamber,wherein the at least one inlet aperture extends in a radial directionrelative to the longitudinal axis of the tubular member between aradially inner peripheral surface portion of the exterior wall and aradially outer peripheral surface portion of the exterior wall; and acover portion at the end portion of the tubular member, the coverportion extending from the partition; and a filter medium associatedwith the at least one outlet aperture and the at least one inletaperture, wherein the tubular member has a cross-section transverse tothe longitudinal axis including a first chamber cross-section and asecond chamber cross-section, and wherein the cover portion at leastpartially covers the second chamber cross-section with respect to thelongitudinal direction.
 13. A filter assembly comprising: a filter baseconfigured to be coupled to a machine; a canister having an open end anda closed end and being configured to be coupled to the filter base; anda filter element configured to be received in the canister, the filterelement including: a tubular member having a longitudinal axis andincluding: an exterior wall extending in the longitudinal direction; apartition at least partially defining a first chamber and at leastpartially defining a second chamber, the partition extendinglongitudinally in the tubular member and being configured to preventflow communication between the first chamber and the second chamberwithin the tubular member; an end portion at least partially defining aninlet port configured to provide flow communication into the firstchamber, and at least partially defining an outlet port configured toprovide flow communication from the second chamber; at least one outletaperture in the exterior wall of the tubular member configured toprovide flow communication out of the first chamber, wherein the atleast one outlet aperture extends in a radial direction relative to thelongitudinal axis of the tubular member between a radially innerperipheral surface portion of the exterior wall and a radially outerperipheral surface portion of the exterior wall; at least one inletaperture in the exterior wall of the tubular member configured toprovide flow communication into the second chamber, wherein the at leastone inlet aperture extends in a radial direction relative to thelongitudinal axis of the tubular member between a radially innerperipheral surface portion of the exterior wall and a radially outerperipheral surface portion of the exterior wall; and a cover portion atthe end portion of the tubular member, the cover portion extending fromthe partition, wherein the cover portion is configured to at leastpartially cover a longitudinal end of the second chamber with respect tothe longitudinal direction; and a filter medium associated with the atleast one outlet aperture and the at least one inlet aperture, whereinthe filter element is configured such that fluid passing through thefilter element from the inlet port to the outlet port passes throughboth the first chamber and the second chamber.
 14. The filter assemblyof claim 13, wherein the filter base includes an inlet passage in flowcommunication with the inlet port of the tubular member, and an outletpassage in flow communication with the outlet port of the tubularmember, and wherein the cover portion is configured to prevent flowcommunication between the inlet passage and the outlet passage of thefilter base without passing through the first chamber and the secondchamber.
 15. The filter assembly of claim 13, wherein the tubular memberhas a cross-section transverse to the longitudinal axis including afirst chamber cross-section and a second chamber cross-section, andwherein the cover portion at least partially covers the second chambercross-section with respect to the longitudinal direction.
 16. The filterassembly of claim 13, wherein the cover portion extends at an obliqueangle with respect to the longitudinal axis of the tubular member. 17.The filter assembly of claim 13, wherein the cover portion is configuredto substantially prevent flow of fluid into the second chamber withoutfirst passing through the filter medium.
 18. The filter assembly ofclaim 13, wherein the cover portion is configured to substantiallyprevent flow of fluid into the second chamber without first passingthrough the first chamber.